steering system in 19631982 Corvettes is described as a semireversible, fastacting, and recirculating ballnut gear with parallelogram linkage behind the front wheels. STEERING GEARBOX AND PITMAN ARM The GM 7808927 steering Steering system parts include the steering gear, the steering linkage, the steering wheel, and the steering column. There are two styles of steering. One has a gear box and parallelogram linkage (Figure 58.1). The other is a simple long rack With power steering, the mechanical lever — the steering wheel — is helped by hydraulic pressure. A beltdriven hydraulic pump provides highly pressurized fluid to the steering gearbox. A relief valve keeps system pressure within safe limits It converts the rotary

motion.of the steering wheel to the linear motion needed to control the wheels. This system also produces a large gear reduction. The gear ratio of the geartrain within the gearbox is a comparison of the angles of 20.4.4 Steering Gearbox The steering gearbox is a very important member in the steering system. The gearbox housing supports the lower end of the steering column. The first gear wheel in the gearbox is connected to the steering shaft so Remove Steering Gearbox I left the power steering pump attached to the gearbox while I removed the engine. Now I can remove the hoses connecting the two units from the gearbox and set aside the pump. The pump has a small amount of 9.1 Steering gearbox fundamental design 9.1.1